Characterization of phase transition of Ba2-xSrxIn2O5 by thermal analysis and high temperature X-ray diffraction |
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Authors: | Hashimoto T. Yoshinaga M. Ueda Y. Komazaki K. Asaoka K. Wang S. |
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Affiliation: | (1) Nihon University, 3-25-40 Sakurajousui, Setagaya-ku, Tokyo 156-8550, Japan |
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Abstract: | The phase transitions of Ba2-xSrxIn2O5 were investigated with various thermal analyses and high-temperature X-ray diffraction. It was clarified that crystal structure of Ba2-xSrxIn2O5 with x=0.0~0.4 varies from brownmillerite through distorted perovskite to another distorted perovskite with increase of temperature. The phase transition from brownmillerite to distorted perovskite was revealed to be first order, whereas transition from distorted perovskite to another one was second order. The specimen with x≥0.5 showed only one first order phase transition from brownmillerite to distorted perovskite. The phase diagram of Ba2-xSrxIn2O5 was established and existence of tricritical point at ~1100°C with x=0.4~0.5 was suggested. This revised version was published online in August 2006 with corrections to the Cover Date. |
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Keywords: | Ba2-xSrxIn2O5 phase diagram quantitative DTA structural phase transition TG-DTA dilatometry high-temperature X-ray diffraction |
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